Painting instrument



J. M. CHRISTMAN PAINTING INSTRUMENT Filed March 21, 1928 gin wanton Z5 L/bHN/Z CHEIETMHN.

aflo'cmq Sept. 10, 1929.

Patented Se t. 10, 1929.

UNITED STATES PATENT OFFICE.

. HN m. GHRISTMAN, or DETROIT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS, To GUARDIAN TRUsT COMPANY or DETROIT, TRUSTEE, or DETROIT, MICHIGAN, A

CORPORATION OF MICHIGAN.

PAINTING INSTRUMENT.

Application filed March 21, 1928. Serial No. 263,395.

This invention relates to painting instruments and more particularly to striping instruments.

In the art of painting, particularly in the art of painting vehicles, great difficulty has I been experienced in striping due to the necessity of erforming the work by hand with resultant dilierences in the technique of workmen. Accordingly, there is a great variance in the finished product as no two workmen have the same touch; one piece of work might have the most delicate of lines while the next or succeeding piece might have heavy, broad lines, thus lacking a desired uniformity. Aside from the variance in the character'of the work, no two workmen will consume the same time on a given piece of work, accordingly, one piece of work is of necessity held awaiting the finish of another piece and, naturally, this delays production; particularly is this true in production on a large sale where the work should proceed step by step with a certain degree of regularity in order to attain the best results. To overcome these objections, applicant has devised an instrument for painting stripes of uniform width; an instrument with which striping may be performed quickly by persons unskilled in the art and with little if any loss of time.

An object of the invention is to provide a striping instrument in the form of a pencil and to construct the same so that liquid paint may be fed therefrom in a predetermined uniform flow. Y

vide a striping instrument in which liquid paint may be fed by gravity from a barrel through a nozzle or point and controlled so that any surplus paint, that is, any paint over and above a predetermined quantity, will be drawn from the point or nozzle by, suction.

Another object of the invention is to provide a painting instrument for painting stripes in which liquid paint may be used, 4 and to provide means whereby a flow of paint from the point or nozzle of the instrument can be controlled by an aspirator arranged to remove all surplus paint over and above a predetermined quantity.

Another object of the invention is to pro- Another object of the invention is to provide a painting instrument comprising a barrel for the reception of liquid paint and a nozzle communicating with the barrel, the nozzle having arranged therein a spring. loaded valve adapted to be opened by means extending'through and beyond the nozzle to engage the surface to be striped.

A further object of the invention is to provide a painting instrument comprising a barrel for the reception of liquid paint and a nozzle communicating with the barrel, the nozzle having arranged therein a spring loaded valve adapted to be opened by a rod "extending through and beyond the nozzle and a suction means connected with the nozzle for removing all surplus paint over and above a predetermined amount.

A further object of the invention is to provide a striping pencil with a guide for positioning the pencil in proper relation to the work under treatment.

A further object of the invention is to provide a striping pencil which has a positive action, highly efficient in operation and yet of marked simplicity as a Whole and with re- 75 spect to each of its component parts so that its manufacture is economically facilitated, both as re ards parts and their assembly.

Other o jects of the invention will appear from the following description taken' in connection with the drawings, which form a part of this specification, and in which:

Figure 1 is a side elevation of the instrument positioned in the support or guide and an aspirator connected thereto, the aspirator being shown in section,

Figure 2 is a front elevation of the support with the instrument positioned therein,

Figure 3 is a longitudinal sectional view of the instrument with a part of the barrel broken away, and

Figure 4 is a sectional view taken on line 4-4, Fig. 3.

Referring tothe drawings for more specific details of the invention, 10 represents a cylindrical body or barrel having threaded on one end a' cap 11, apertured as indicated at 12 to provide a vent. The other end of the barrel has threaded thereon a short extension 13 provided with a thick end wall 14, both the 1 by a pipe line 38 to a suitable source of com-- barrel and extension being knurled to provide a suitable grip. bored as at 15 and parallel to the axial bore and only slightly off center is a bore 16 and a counterbore 17 the counterbore having a valve seat 18. provided with a radial bore 19 communicating with a bore 20 extending from the outer end of the wall 14 inwardly, the object of which will hereinafter appear.

A nozzle or point 21 is formed with a reduced end portion 22 which is fitted snugly into the axial bore 15, and this reduced end portion is threaded to receive a nut 23 by means of which-the nozzle is secured in position with a suitable gasket 24 interposed.

The nozzle 21 is provided with a lateral tapering passage 25 increasing in cross section as it extends toward the base of the nozzle where it communicates with the bore 16. A valve 26 is positioned in the counterbore l? and urged against the seat-18 by a coil s vring interposed between the valve and the lower face of the nut 23 or other suitable means for seating the valve may be employed.

Connected to the valve is a rod 27 which.

extends through and beyond the nozzle 21. Any pressure on the free end of the rod 27 will open the valve, hence, when the nozzle is in engagement with a surface to be striped the valve is in an open position. The nozzle 21 also has a passage 28 somewhat larger than the passage 25 and slightly contracted at the point or free end of the nozzle as indicated at 29. The passage 28 is inclined from, the passage 25 and extends from the point of the-nozzle substantially .003 of aninch back of the outlet passage 25 to the base of the nozzle where it communicates with the bore 20. A connection 30 is fitted in the radial bore 19 and has secured thereto one end of a flexible pipe line 31, the other end of which is secured body of an aspirator 33 and communicating with a recess 34 therein. The aspirator 33 comprises a Venturi tube35 having one end communicating with the recess 34 and mounted in the Venturi tube is a nozzle 36 formed upon one end-of a'connection 37 threaded into the body of the aspirator 33 and connected pressed air.

In Figs. 1 and 2 there is shown a support or guide for the instrument comprising a channel member 39 having mounted thereon in an inclined position a bifurcated arm 40 upon which is pivoted a support 41 comprising alike clamping jaws 42 adapted to receive the instrument and a set screw43 for actuating the jaws, to clamp the instrument in the desired position.

When the instrument is connected to a suitable source of compressed air, there is a continuous flow of air through the nozzle in he Venturi tube causing suction through The end wall 14 is axially The end wall 14 is further to a connection 32 threaded into the the pipe line connected to the pencil and thus through the passage 28 in the nozzle 21 by reason of which all surplus paint fed through the passage 25 in the nozzle 21 is removed. In other words, the aspirator is in continuous operation and will remove by suctionany surplus paint appearing at the nozzle of the instrument.

Upon placing the nozzle of the instrument against the surface to be striped .the valve 26 in the nozzle is opened to permit the liquid paint in the barrel to flow by gravity from the barrel, through the passage 25 in the nozzle, the opening of the valve being eflected by an upward pressure on the rod attached thereto and extending through the nozzle. As soon as the nozzle of the instrument is removed from the work under treatment the valve in the nozzle is closed and checks any further flow of paint. The suction at the end of the nozzle is sufficient to remove any excess paint appearing during the use of the instrument or any drip that might appear on the end of the nozzle when the instrument is not-in use.

Although this invention has been described in connection with certain specific embodiments, the rinciples-involved are susceptible of numerous other applications which will readily occur to persons skilled in the art. The invention is, therefore, to be limited only as indicated by the scope of the appended claims.

Having thus described the various features of my invention what'I claim as new and desire to secure by Letters Patent is:

1. A striping instrument comprising a container, a nozzle therefor having a plurality of passages, means controlling one of the passages and a suction means for the other passage.

2. A striping instrument comprising a container, a nozzle therefor having a plurality of passages, a valve controlling one of the passages and a suction means connected to the other passage.

3. A striping instrument comprising a nozzle having dlverging passages, a chamber connected to one of the passages and a suction means connected to the other passage.

4. A striping instrument comprising a nozzle having diverging passages, one tapering from the end of the nozzle toward the base pering passage and a suction means connected to the assage having the tapering end.

A striping instrument comprising a noz:

6. A striping instrument comprising a nozzle having diverging passages, one of the passages tapering from the discharge end of the nozzle toward the base thereof, the other passage having a contracted end portion opening back of the discharge end of the ta pering passage, a chamber connected to the tapering passage and a suction means connegted to the passage having the contracted en 7. A striping instrument comprising a barrel, a cap on one end of the barrel, a nozzle on the other end of the barrel, the nozzle having a pluralitv of passages, one communicating with the barrel, a suction'means connected to the other passage and a spring loaded valve controllin the passage communicating with the barrel.

8. A striping instrument comprising a barrel, a cap on one end of the barrel, a nozzle on the other end of the barrel, the nozzle having two passages, one communicating with the barrel, a suction means connected to the other passa e, a spring loaded valve controlling the passage communicating with the barrel and means extending through and beyond the nozzle for opening the valve. Y

9. A striping instrument comprising a barrel, a cap on one end of the barrel, a nozzle on the other end of the barrel, the nozzle having diverging passages, one communicating with the barrel and the other connected to a suction means.

10. A striping instrument comprising a barrel, a cap on one end of the barrel, a nozzle on the other end of the barrel, the nozzle having two passages arranged in diverging re-' lation with respect to each other, one communicating with the barrel and a suction means connected to the other, a spring loaded valve controlling the passage connected to the barrel and means carried by the valve extending through and beyond the nozzle for opening the valve.

11. A striping instrument comprising a barrel, a vented cap on one end of the barrel, an extension on the other endof the barrel, the extension having a thick end wall axially bored and provided with passages, one of the passages communicating with the barrel, the other opening through the wall of the extension, a nozzle positioned in the axial bore, the nozzle having two passages, one connected with the passage communicating with the barrel and the other communicating with the passage extending through the wall 'of the extension, 2. spring loaded valve positioned in the passage communicating with the barrel, a stem on the valve extending through and beyond the nozzle, a suction means connected tothe passage through the wall of the extension.

12. A striping instrument comprising av barrel, a vented cap on one end of the barrel, an extension on the other end of the barrel,

the extension having an axial bore and a plurality of passages, one of the passages communicating with the barrel and the other communicating with the radial bore in the extension, a nozzle positioned in the axial bore, the nozzle having tapering passages, one connected with the passage communicating with the barrel and the other connected with the passage communicating with radial bore, a valve in the passage communicating with the barrel, means extending from the valve through and beyond the nozzle for opening the valve and a suction means connected to the radial bore.

13. A painting instrument comprising a barrel, a vented cap on one end of the barrel, an extension on the other end of the barrel, the extension having a thick end portion provided with a radial bore,"an axial bore and a plurality of passages, one of the passages extending through the end Wall and communicating with the barrel and the other communicating with the radial bore, a nozzle positioned in the axial bore, the nozzle having passages communicating respectively with the passages in the extension, a spring loaded valve positioned in the passage communicating with the barrel, a stem on the valve extending through and beyond the nozzle and a 1s)uction means connected with the radial ore.

14. A striping instrument comprising. a guide, a support carried thereby, an instrument secured in the support, a nozzle for the instrument having'a plurality of passages, a valve controlling one of the passages and a suction means connected to the other passage.

15. A striping instrument com rising a grooved guide, an arm carried there y, a support pivoted on the arm, an instrument secured in the support, a nozzle for the instrument, the nozzle having a plurality of passages, one communicating with the body of the instrument and a suction means connected with the other passage.

16. A striping instrument comprising a nozzle having a feeding passage and a passage under suction for withdrawing surplus material discharged therefrom.

17. A striping instrument comprising a feeding nozzle and a suction nozzle, the latter co-operating with the discharge end of the former.

In testimony whereof I afiix my signature.

JOHN M. CHRISTMAN. 

